Best 4TB NAS hard drives

* Shown as a full table on desktop, and as cards on tablet and phone.

WD40EFPX
WD Red Plus
CMR
Capacity4 TB
ClassNAS
Failure rate-
Price / TB£51.58
£206best live price
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WD4005FFBX
WD Red Pro
CMR
Capacity4 TB
ClassNAS-Pro
Failure rate-
Price / TB£45.80
£183best live price
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WD4004FRYZ
WD Gold
CMR
Capacity4 TB
ClassEnterprise
Failure rate-
Price / TB£70.75
£283best live price
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ST4000VN006
Seagate IronWolf
CMR
Capacity4 TB
ClassNAS
Failure rate-
Price / TB£45.00
£180best live price
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ST4000NT001
Seagate IronWolf Pro
CMR
Capacity4 TB
ClassNAS-Pro
Failure rate-
Price / TB£49.00
£196best live price
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ST4000VX016
Seagate SkyHawk
CMR
Capacity4 TB
ClassSurveillance
Failure rate-
Price / TB£42.50
£170best live price
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HDWG440
Toshiba N300
CMR
Capacity4 TB
ClassNAS
Failure rate-
Price / TB£60.83
£243best live price
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HDWR440
Toshiba X300
CMR
Capacity4 TB
ClassDesktop
Failure rate-
Price / TB£89.79
£359best live price
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WD40EZAX
WD Blue
CMR
Capacity4 TB
ClassDesktop
Failure rate-
Price / TB£72.73
£291best live price
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HAT3300-4T
Synology Plus Series
CMR
Capacity4 TB
ClassNAS
Failure rate-
Price / TB£59.24
£237best live price
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HAT5320-4T
Synology Enterprise Series
CMR
Capacity4 TB
ClassEnterprise
Failure rate-
Price / TB-

Ranked by measured failure rate (Backblaze AFR). $/TB uses the cheapest live price where available.

Every drive here is a CMR (RAID-safe) 4TB model in current production. For a NAS or RAID array, pick the lowest failure rate you can afford; enterprise drives (Exos, Ultrastar, MG) trade some noise and power draw for the longest workload ratings. See how to choose a NAS drive for the full rundown.

Frequently asked questions

What is the most reliable 4TB NAS drive?
None of the 4TB drives have large-scale Backblaze failure data yet; choose by manufacturer class and warranty.
Are 4TB NAS drives CMR or SMR?
Every 4TB drive we recommend for NAS use is CMR (conventional recording), the RAID-safe choice. We exclude SMR drives from NAS picks.